MANUFACTURING METHOD OF WHEEL FOR SADDLE-RIDING TYPE VEHICLE

Japanese Patent JP2022013538

A

To provide a manufacturing method of a wheel for a saddle-riding type vehicle, which can sufficiently improve the mechanical properties of a rim part.SOLUTION: A manufacturing method of a wheel (100) for a saddle-riding type vehicle according to an embodiment of the present invention includes a step (A) of forming an intermediate product (110') comprising an original hub part (110'), an original rim part (120'), and a plurality of original spoke parts (130') by gravity casting, a step (B) of performing flow forming processing on the original rim part of the intermediate product and stretching at least a part of the original rim part in a first direction (D1) from the center to one side in an axial direction and in a second direction (D2) from the center to the other side in the axial direction, respectively, while rotating the intermediate product, and a step (C) of completing at least the rim part (120) by cutting the intermediate product after the step (B). The ratio of a wall thickness (t1) of the original rim part after the step (B) and before the step (C) to a wall thickness (t2) of the rim part after the step (C) is 132% or more and 433% or less.SELECTED DRAWING: Figure 4

SUENAGA KENTARO
KURIMOTO YUKIHIRO
SUZUKI YASUNORI
MATSUBARA KEISUKE
KASHIMA HITOSHI
FUKUJI HIDEHIRO
NAGAYAMA JUN
OSHIMA KAHORI

JP2020145282A

January 18, 2022

August 31, 2020

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YAMAHA MOTOR CO LTD

B21H1/04; B21H1/00; B22C9/28; B60B1/08

JPH09267601A	1997-10-14
JPH1192849A	1999-04-06
JP5205655B2	2013-06-05
JP2000288669A	2000-10-17

WO2019131849A1	2019-07-04
KR20130115672A	2013-10-22
KR101529866B1	2015-06-19
CN106311848A	2017-01-11

Okuda Seiji
Ryoji Yamashita
Kajitani Mido

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